Reproductive System — Biology STD 10 — Question

Why is urine yellow in colour ?

Name the following:
The blood plasma from which fibrinogen, the blood clotting protein, has been removed.

Define the following:
Birth rate

Name the Following :
The cells which protect the human body from invading bacteria.

Name the Following
The structure in which testes are present in man.

Name the Following :
The waxy protective covering present on the leaf epidermis meant to reduce transpiration rate.

Some adult women may develop facial hairs. What may be the cause for it?

Name the Following :
The substances which reduce the rate of transpiration.

A candidate studied the importance of certain factors in photosynthesis. He took a potted plant and kept in the dark for over 24 hours. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch.
Is there any control in this experiment? If so, state it.

Name the following:
The hormone which stimulates the entire sympathetic nervous system.